headunit questions....

as much i love eclipse, i'm thinking i might wanna try something else. i need something with a 3-way xover, time alignment, and a nice eq. now i want something that i can hook an ipod too (future possibility) aux input, and xm ready. right now i have a plug n play xm radio so i would need a tuner to connect to the deck correct? then would i have to contact xm to have the tuner activated? with these new decks coming out, i wouldn't mind picking up the older model cheap.